# why does the equation x^2=-9 has no real solution why does the equation x^2 = 9 has two solutions

56,329 questions, page 387
1. ## Elem. Ed.

Can you please help with this question? Home visits,where a teacher visits children from her classroom and their parents in their homes,are valuable to all concerned. Which of the following is the greatest challenge to this form of parent involvement? 1.

asked by Jill on May 6, 2007
2. ## Algebra II

I need to write a polynomial in SIMPLEST FORM having roots 2,-2 and 4. I have to gt rid of the parentheses by multiplying everything out.Did I do it correctly? Also, someone said yes, but I'm wondering if it suppose to have anything else done to it-it

asked by Jessica on September 22, 2011
3. ## math

A cereal company finds that the number of people who will buy one of its products in the first month that it is introduced is linearly related to the amount of money it spends on advertising. If it spends \$40,000 on advertising then 100,000 boxes of cereal

asked by Laura on February 18, 2010
4. ## Chemistry

1)The following balanced chemical equation represents the reaction of calcium carbonate CaCO3 (s), with hydrochloric acid : CaCo3(s) + 2HCl (aq) -> CaCl2(aq) + CO2(g) + H2O(l) If 155 g of calcium carbonate reacts with 245 g of hydrochloric acid, what mass

asked by Nikki on December 19, 2012
5. ## Math(Equation Writing)

Can you please help me write out the equation for these? (not solve) 1. The number of trees planted by the Alpine Nursery in April was three more than twice the number of trees planted by the nursery in March. If 73 trees were planted in April, how many

asked by Bryce on August 24, 2011
6. ## Chemistry

Use the equation for the synthesis of hydrogen to answer the following. 10 points. C (s) + H2O (l) -> CO (g) + H2 (g) deltaH = + 31.3 kcal/mol carbon deltaS = +32 cal/(mol•K) Calculate the energy change (deltaH) when 5.00 g of carbon is consumed.

asked by John on February 19, 2013
7. ## Physics

Four identical charges (+1.6 ìC each) are brought from infinity and fixed to a straight line. Each charge is 0.36 m from the next. Determine the electric potential energy of this group. i placed the charges as follow q1 q2 q 3 q4 and used q1 as the

asked by Kevin on September 21, 2006
8. ## chemistry

On this problem I keep getting the wrong answer. I am subtracting the initial concentration of Cl2 by the equilibrium concentration then using the difference to subtract for the rest using the mole ratios. Then i used the keq constant equation of

asked by andy on April 8, 2010

I have 2 question on science 7. please help me. 1.state whether each substance is a mechanical mixture, a suspension, or a solution. My answers are at the bottom. a)green relish b)soda pop in a glass c)bubble tea d)traditional Aborigial paint made of red

asked by Arushi on December 12, 2010
10. ## chemistry

Run # Volume NaOH used (mL) 1 4.1 2 4.3 3 2.8 Concentraion of NaOH: 0.113 M pH of acid: 2.84 the questions are: #moles of NaOH: ? initial acid concentration: ? Determine the Ka and pka of the weak acid: ? So here is what I did: Shaked for several minutes

asked by fenerbahce on July 15, 2012
11. ## Chemistry

Sulfite (SO3^2-) in wine was measured by the following procedure: 50.0ml of wine were added 5.00ml of solution containing (0.8043 g KIO3 + 5 g KI)/100ml. Acidification with 1.0ml of 6.0 M H2SO4 quantitatively converted IO3^- into I3^-. I3^- reacted with

asked by Ken on October 24, 2011
12. ## Math

The table lists the total number of bags of grass seed it took to plant a certain number of lawns. All of the lawns were the same size. Number of Lawns: 4 = 22, 5 = 27.5, 6 = 33, 7 = 38.5, and 8 = 44. (The numbers that are 4-8 are the number of lawns, the

asked by LilaXD on April 22, 2019
13. ## Chemistry - check answers

Can someone please check my answers and make sure they're correct? A) How much heat would it take to raise the temperature of 46.0 g of water from 90.0 to 100.0 C? Answer using correct sig figs, sign, and units. My answer: +1.92x10^3 J B) How many joules

asked by Amanda on February 23, 2014
14. ## Chemical Kinetics

The Decomposistion of nitrosyl chloride was studied: 2NOCl(g)--2NO(g)=Cl2(g) The following data were obtained where Rate= - change[NOCl] ------------ change in temp [NOCl]0 Initial Rate (molecules/cm^3) (molecules/cm^3*s)

15. ## math-calculus

The following equation shows the approximate relationship between the percentage y of total personal consumption spent on food and the corresponding percentage x spent on education. y = 38/x^0.38 percentage points; (6.5 ≤ x ≤ 17.5). According to the

asked by Trisha on December 20, 2012
16. ## Algebra

The area of a rectangular piece of land is 280 square meters. If the length of the land was 5 meters less and the width was 1 meter more, the shape of the land would be a square. Part A: Write an equation to find the width (x) of the land. Show the steps

asked by Anonymous on May 9, 2014
17. ## Algebra

An oil spill from a tanker in pristine Prince Williams Sound in Alaska begins in a circular shape only 2 ft across. what happens to the area if the diameter is doubling each hour. How large will the spill be in 24 h? diameter= 2^(t+1) t is time in hours.

asked by Stacy on July 3, 2007
18. ## Poetry

I need to change this poem to an iambic pentameter poem..Please HELP!!!! Love, unconditional, unbreakable, unmistakable . A beating within your heart unstoppable. The realistic magic ever so real, That you cannot explain but only feel. The warmth inside

asked by Annah on May 4, 2011
19. ## calculus

Consider the graphs of y = 3x + c and y^2 = 6x, where c is a real constant. a. Determine all values of c for which the graphs intersect in two distinct points. b. suppose c = -3/2. Find the area of the region enclosed by the two curves. c. suppose c = 0.

asked by mary on March 23, 2010
20. ## Discrete Mathematics

Which of the following scenarios could be described by the real valued function f(x) = x3 + 3x2 + 2x? A shoebox has a length that is 1 inch longer than its width and a height that is 1 inch longer than its length, We want to know the product of three

asked by Joy on July 30, 2013
21. ## English

1. How did the book Tom Sawyer relevant to Mark Twain's real life? 2. How did the boys feel when they were in jackson's island 3. Why did the author put the position of the chapters that way? 4. Descibe all-american boy 5. Descibe the life of boyhood in

asked by Vanessa on February 10, 2008
22. ## Physics

A 100-kg box is suspended from two ropes; the left one makes an angle of 20degrees with the vertical, and the other makes an angle of 40degrees. What is the tension in each rope. I think I've got the basics: I have Fx=T1(x) + T2(x)= 0 to calc the first

asked by Stephanie on April 22, 2011
23. ## Chemistry

A metal, M, of atomic weight 96 u reacts with fluorine to form a salt that can be represented as MFx. In order to determine x and therefore the formula of the salt, a boiling point elevation experiment is performed. A 10.9 g sample of the salt is dissolved

asked by someone on March 4, 2017
24. ## Physics-not sure how to find the charge q

Posted by ~christina~ on Sunday, March 30, 2008 at 9:14am. Two small silver spheres with a mass of 10.0g, are separated by 1.00m. Calcuate the fraction of the electrons in one sphere that must be transfered to the other to produce an attractive force of

asked by ~christina~ on April 2, 2008
25. ## Algebra

asked by Helpless in Math on May 27, 2007
26. ## Algebra

The problem has two related parts 1) let a be an arbitrary real number. Find the distance between the point (1,2) and the point (4,a). (answer should be an algebraic expression in terms of a). 2) find the value of b for which the point (0,b) is equidistant

asked by Tyler on February 24, 2016
27. ## Algebra

The problem has two related parts 1) let a be an arbitrary real number. Find the distance between the point (1,2) and the point (4,a). (answer should be an algebraic expression in terms of a). 2) find the value of b for which the point (0,b) is equidistant

asked by Kayla on February 24, 2016
28. ## Math

How do I simplify this: (The ^ symbol means 3) -3(12)-{5(-4)-2^ I tried it,and got-8,however when I rechecked my work I got -64. Please help! Please help! where is the other } in the equation? And ^ means to the power so -2^3 would be minus 2 to the 3rd

asked by Janese on March 2, 2007
29. ## Stats

Think of a situation like the thinking-suppression device example. Come up with a plausible scenario, with real-life data, using an observable that is binomial, and which you can measure in at least two di erent groups. For example: you might ask if

asked by Michele on November 13, 2007
30. ## question

A temperature of 41 degrees F is equivalent to 278.2 degrees K, while a temperature of 86 degrees F is equivalent to 303.2 degrees K. Find the equation converting Kelvin temperature to Fahrenheit. What is the Fahrenheit temperature when it is 180 degrees

asked by bianca on March 1, 2011
31. ## math

An object's weight on the Moon is less than its weight on Earth. This is because the Moon exerts less gravitational force on an object than Earth does. The equation m = can be used to find an object¿s weight on the moon, where m is the object¿s weight on

asked by nmng on April 5, 2011
32. ## Stiochiometry

Equation 2Mg+O2= 2MgO Lab data: Magnesium ribbon= .04 grams Magnesium Oxide= .09 2. Using the initial mass of magnesium, calculate the moles of oxygen and then moles of magnesium oxide produced. What is the mole ratio of the reactants? 3. Calculate the

asked by Emily on February 26, 2009
33. ## Chemistry

Calculate [H3O+] in the following aqueous solution at 25 ∘C: [OH−]= 1.9×10−9M Calculate [H3O+] in the following aqueous solution at 25 ∘C: [OH−]= 2.1×10−2M Calculate [H3O+] in the following aqueous solution at 25 ∘C: [OH−]= 6.1×10−12M

asked by Brandon on April 29, 2014
34. ## Chem

Please tell me if these are right! What are the [H3O+] and [OH-] for a solution with the following pH values? a. 10.0 I got 1.0*10^-10 for [H3O+] and 1.0*10^-4 for [OH-] b. 5.0 I got 1.0*10^-5 for [H3O+] and 1.0*10^-9 for [OH-] c. 7.00 I got 1.0*10^-7 for

asked by Jessica on December 8, 2010
35. ## Chemistry

Can someone please tell me if I am doing this problem correctly. Thank you! Given: 450 mL (0.450L); 0.250 M KNO Need: Mass of KNO Q) What mass of KNO3 (MW=101) is needed to prepare 450mL of 0.250 M KNO3 in water? A) 0.450 L Solution x 0.250 M KNO/1 L

asked by Kishwa on April 1, 2013
36. ## Chemistry

You are required to prepare 100g of potassium nitrate crystals from its saturated solution at 75 degree Celsius. If the solubility of potassium nitrate at 75 degree Celsius is 155g and 20 degree Celsius is 31g, find the weight of potassium nitrate solution

asked by Sagnik on September 18, 2016
37. ## Pre Calc

7. The Sandusky Little League uses a baseball throwing machine to help train 10-year old players to catch high pop-ups. It throws the baseball straight up with an initial velocity of 48 ft/sec from a height of 3.5 ft. a. Find an equation that models the

asked by Anonymous on November 18, 2010
38. ## pre-calculus

form a polynomial f(x) with real coefficients having the given degree and zeros. degree 5; zeros -7; -i;-9+i enter the polynomial. f(x)=a(?)

39. ## Algebra2

-3x^2+12y^=84 What are the domain and range My answer domain: all real numbers range: y (less than -) -sqrt7 or sqrt7

asked by Steve on March 8, 2017
40. ## math

define and identify types of sets define and identify types of real numbers and their properties

asked by lisa on August 26, 2009
41. ## Chemistry

[6 points] You need to make a solution of Ca(NO3)2 for a class demonstration. First, you measure a quantity of the solid Ca(NO3)2 by weighing the reagent container before obtaining the sample (4.2540 ± 0.0003 g) and after taking some reagent (3.9440 ±

asked by Alex on April 7, 2010
42. ## Algebra

One number is 6 more than another. If the sum of the smaller number and 3 times the larger number is 34, find the Two numbers. I have errored somewhere please assist 3x+x=6=34 4x+4x=2x=7 I need two find both numbers Your equation does not match the English

asked by Amanda on April 22, 2007
43. ## math

the amount of revenue brought in by states from motor vheicle licenses increased at a relatively constant rate of 499.79 million dollars per year from 1990 to 2000. In 2000, the states brought in 15099 million dollars in revenue from motor vehicle. a: what

asked by Taylor on November 14, 2013
44. ## Chemistry

Could you show me where to start on solving this equation? The reaction in question will be carried out in a calorimeter. The volume of the chamber inside is 2.00 L. Experiment starts by evacuating the chamber to 0.00 kPa. Then oxygen gas is filled into

asked by Amber on April 13, 2017
45. ## Chemistry

Could you show me where to start on solving this equation? The reaction in question will be carried out in a calorimeter. The volume of the chamber inside is 2.00 L. Experiment starts by evacuating the chamber to 0.00 kPa. Then oxygen gas is filled into

asked by Amber on April 14, 2017
46. ## Chemistry

Could you show me where to start on solving this equation? The reaction in question will be carried out in a calorimeter. The volume of the chamber inside is 2.00 L. Experiment starts by evacuating the chamber to 0.00 kPa. Then oxygen gas is filled into

asked by Amber on April 16, 2017
47. ## math stuff

Do the exact calculation: 7182 x 2123= ________ Approximate to the nearest hundred _____x_____=__________ Difference between exacct and approximate value=_______ Can you help me with another problem too? N of the 20 coins are quarters and the rest are

asked by Marisol on April 7, 2007
48. ## Physics

A 145. drop tower. This is an evacuated vertical tower through which , among other possibilities, a 1m diameter sphere containing an experimental package can be dropped. a) How long is the sphere in free fall? b)What is its speed just as it reached a

asked by sam on September 17, 2006
49. ## Chemistry

In the laboratory you will be provided with a 1.0 x 10-5 M primary stock solution of fluorescein (MW=332.31g/mol). The calibration curve should include a blank, 0.025, 0.05, 0.075, 0.10, 0.15, and 0.25 micromolar fluorescein solutions. Since you will be

asked by Guy on October 19, 2016
50. ## Composition and Communication 1

Write several sentences describing a recent interaction with a friend or family member about personal finance or credit cards. This interaction may be imagined or real. Use at least five different pronouns, adverbs, and adjectives in your sentences.

asked by Anonymous on November 23, 2010
51. ## philosophy

I am having big trouble! I was given a topic that I hav eto present, and reading it makes no sense to me. Postmodernism theory-I have to explain the M E A L: Metaphysics-what is real, Episttemology-what is true, Axiology-what is the value, and logic, what

asked by Lisa on October 17, 2008
52. ## To Kill a Mockingbird

What does Atticus say about mobs? Thank you for using the Jiskha Homework Help Forum. In Chapter 15, according to Atticus, incident at the jail was a demonstration of mob psychology. People in a group, he says, will do things that are unworthy of them as

asked by DeShaun on October 16, 2006
53. ## calculus help

Suppose that f'(x)= (2x^2-5x-12)/(3x^2-7x+2) and that f(x) is continuous for all real numbers x. a) Do a sign diagram to list the values of x where f(x) has local maximums and local minimums. In addition, list the intervals where f(x) is increasing and

asked by Anonymous on April 21, 2014
54. ## Math

When would a straight-line graph be applicable in a real life situation? I can not think of any? or could you apply this to the drinking age? You can purchase and drink beer once you are = or greater than 21 years old? Im I thinking on the right page?

asked by Anonymous on April 7, 2007
55. ## IT 221

The key to the successful use of a communication plan is to start it before the implementation of the final solution or change in the process. Start with a realistic evaluation of the the people and groups that have or could have an influence on the

asked by Sam on December 9, 2008
56. ## Calculus

The percentage of alcohol in a person's bloodstream t hr after drinking 8 fluid oz of whiskey is given by the following equation. A(t) = 0.26te-0.3t , (0 t 12) (a) What is the percentage of alcohol in a person's bloodstream after 1/2 hr? After 6 hr? (Round

asked by Shan on July 11, 2013
57. ## Algebra 2

A package with square ends has combined length and girth(girth is perimeter of a cross section) of 120 in. The surface area of the entire package is 3600 sq. in. Determine the dimensions of the package. s in. * s in.* l in. One solution is: 11.08in. *

asked by Nancy on April 29, 2012
58. ## algebra2

A package with square ends has combined length and girth(girth is perimeter of a cross section) of 120 in. The surface area of the entire package is 3600 sq. in. Determine the dimensions of the package. s in. * s in.* l in. One solution is: 11.08in. *

asked by Chelsea:) on April 26, 2012
59. ## Chemistry

How would the following affect the calculated value of neutralizing power of antacid (make it higher, lower or no effect)? [The lab uses the back titration technique] 1) The solution mixture of reacted antacid and excess of HCl spattered out the flask

asked by Emily on November 6, 2017
60. ## chem

assuming you have o.4g of Y(OH)3, calculate the mass of Ba)2 required to produce YBa2Cu3O7. Is that BaO2 for Ba)2? Is that really BaO2 or BaO. BaO2 is barium peroxide, not oxide. Y(OH)3 ==> YBa2Cu3O7 Step 1. Convert 0.4g Y(OH)3 to mols Y(OH)3. Step 2.

asked by nick on October 24, 2006
61. ## Math

Could someone answer this question so I understand it. Thanks The marginal price dp/dx at x units of demand per week is proportional to the price p. There is no weekly demand at a price of \$100 per unit [p(0)=100], and there is a weekly demand of 8 units

asked by Anonymous on April 28, 2011
62. ## Math

Could someone work this question out so I understand it. Thanks The marginal price dp/dx at x units of demand per week is proportional to the price p. There is no weekly demand at a price of \$100 per unit [p(0)=100], and there is a weekly demand of 8 units

asked by Jules on April 29, 2011
63. ## chemistry

sodium metal reacts with hydrogen gas to yield solid sodium hydride ( NaH ). A reaction mixture contains 10.00 g sodium metal and 0.235 g of hydrogen gas. write a balanced chemical equation for this reaction? what is your limiting reactant? what is your

asked by Sofia on July 19, 2018
64. ## Math

Could someone work this question out so I understand it. Thanks The marginal price dp/dx at x units of demand per week is proportional to the price p. There is no weekly demand at a price of \$100 per unit [p(0)=100], and there is a weekly demand of 8 units

asked by Jules on April 29, 2011
65. ## algebra

A couple purchased a house in 2005. In 2009 the house appraised for \$475,000. The couple refinanced the house in 2014 and the appraisal was \$468,000. The couple determined a linear relationship existed between the the number of years since 2005 and the

asked by Mel on February 4, 2017
66. ## Math evaluating expressions with rational numbers

Liquid nitrogen freezes at -346 degrees F and boils -321 F. Janice gradually heats frozen nitrogen 1 1/2 degrees several times over an hour. 1)Define variables for the number of times Janice increases the temperature and the temperature of the liquid

asked by Kyra on September 14, 2014
67. ## Math

A shoe manufacturer determines that the annual cost of making x pairs of one type of shoe is \$30 per pair plus \$100,000 in fixed overhead costs. Each pair of shoes that is manufactured is sold wholesale for \$50. a. Find the equations that model Revenue and

asked by Rony on March 15, 2010

I am having a real issue with this one problem the problem is : y=1/3x-3 I am supposed to graph the problem and then find the y intercept. First I substituted x with 12. Y=1/3(12)-3 s divided by 12 is 4, now I subtract 3from 4 and get 1 therefore, my first

asked by Lisa on November 22, 2009
69. ## Equilibrium

An aqueous solution of carbonic acid reacts to reach equilibrium as described below. H2CO3(aq) + H2O(l) HCO3^-(aq) + H3O^+(aq) The solution contains the following solute concentrations: Carbonic Acid: 3.3*10^-2 mol/L HCO3^-: 1.19*10^-4 mol/L H3O^+:

asked by Tyler on August 3, 2015
70. ## Math

Jerry earned \$18,500 one year and then received a 10.5% raise. What is his new yearly salary? would this be the correct way to set this up and the correct answer? \$18500*10.5=\$20442.50 You got the correct answer, but didn't type the correct equation. Which

asked by Stephanie on May 27, 2007
71. ## Chemistry

A sample of InCl3, is known to be contaminated with NaCl. The contaminated sample weighs 2.84g. When the contamintaed sample is treated with excess AgNO3(aq). 574 grams of AgCl(s) are obtained. What is the percentage by mass of InCl3 in the sample? (All I

asked by Carlos on January 21, 2007
72. ## calculus help lttle question

find the area of the regin bounded by the graphs of y=-x^2=2x=3 and y=3. i don't need help solving the problem and but i am a little confused. ok the graph is a parabola and i drew a parobla with y= 3. now when find the area, am I finding the area on the

asked by david on January 8, 2007
73. ## physics

Water flows steadily from an open tank into a pipe. The elevation of the top of the tank is 10.2 m, and the elevation at the pipe is 3.90 m. The initial cross-sectional area of the pipe is 6.40×10^−2 m; and at where the water is discharged from the

asked by AE on November 30, 2009
74. ## math

drama club sold adult tickets for \$8 and kid tickets for \$5. for the final performance a total of 226 tickets were sold for a total of \$1670. how many adult tickets were sold for the performance? X = # of adult tickets Y = # of kid tickets X + Y = 226 8X +

asked by mario on March 28, 2007
75. ## Organic Chem/ Calculate Yield

How would you calculate the percent yield for a reaction that began with 10 moles of acetone and 16 moles of benzaldehyde which yielded 6 moles of dibenzalacetone as the product? The molecular weights are as follows (acetone = 58.08 g/mole), (benzaldehyde

asked by Steve on March 8, 2007
76. ## Please Check My Math Work

Hi. - I solved this problem,but I am not sure if it is correct.If you can please tell me if it is right or if it is wrong what is wrong with it.: 6y^2-54= (3y-6)(2y+9) *Many of you may be are wondering why my title is,"[C]razy Baby. - [Iloveyou]"it is

asked by [C]razy Baby.-[iloveyou] (Margie) on February 9, 2007
77. ## word problem help algebra

1) For a walkathon a sponsor commmited to give you a flat ffe of \$5 plus \$2 for every mile you walk. Write an expression for the total amount you will collect from your sponsor at the enf of the walkathon. Then evaluate your =expression for 20 miles

asked by marko on October 24, 2011
78. ## algebra worD PROBLEM

1) For a walkathon a sponsor commmited to give you a flat ffe of \$5 plus \$2 for every mile you walk. Write an expression for the total amount you will collect from your sponsor at the enf of the walkathon. Then evaluate your =expression for 20 miles

asked by marko on October 24, 2011
79. ## Chemistry

(I need help with these two questions. I don’t know how to solve it.) 1. A student takes 215mL of a 5.0M HCI solution and places it into a beaker. The students then adds enough water to the beaker to make 750mL. Calculator molarity of this new solution.

asked by Samantha on April 10, 2018
80. ## College Gen.Chemistry

A student wanted to determine the amount of copper in a sample of copper ore. The student dissolved a 2.500 ± 0.001 g piece of copper ore in about 75 mL of nitric acid; then, a complexing agent was added. The student transferred this solution to a

asked by Anonymous on March 25, 2014
81. ## Chemistry - Science (Dr. Bob222)

A student wanted to determine the amount of copper in a sample of copper ore. The student dissolved a 2.500 ± 0.001 g piece of copper ore in about 75 mL of nitric acid; then, a complexing agent was added. The student transferred this solution to a

asked by Anonymous on March 25, 2014
82. ## Math-Sine wave function

A merry-go-round takes 15 seconds to complete one revolution/spin. Within that time, each horse moves up and down five times. The vertical motion of the horse spans a range of 50 cm, and the horse is 1 m high at its vertically centre position. a. Sketch a

asked by Leora on July 10, 2018
83. ## Physics

A block of mass m1 = 22.0 kg is connected to a block of mass m2 = 40.0 kg by a massless string that passes over a light, frictionless pulley. The 40.0-kg block is connected to a spring that has negligible mass and a force constant of k = 260 N/m as shown

asked by Anonymous on March 12, 2013
84. ## Chemistry

4. 5.6 x 10-6 mol of A and 5 x 10-5 mol of B are mixed in a 200 mL flask. The system is represented by the equation: 2A + B --> 3C I 2.8x10-5 M 2.5x10-4 0 C -2x -x +3x E 2.8x10-5-2x 2.5x10-4-x 3x10-5 B = 2.5x10-4-x = 2.4x10-4 x = 1x10-5 A =

asked by Katie on May 17, 2012
85. ## Math

The organized crime boss and perfume king Butch (Stinky) Rose has daily overheads (bribes to corrupt officials, motel photographers, wages for hit men, explosives, and so on) amounting to \$30,000 per day. On the other hand, he has a substantial income from

asked by Amanda on September 14, 2016
86. ## Chemistry

Why is the equivalence point of a weak acid-strong base titration above 7.0? How can the data reflect this? The titration of a weak acid with a srong base produces a salt of the two. The anion is hydrolyzed in water solution but the cation is not. A^- +

asked by Anonymous on April 23, 2007
87. ## Pre-Calculus

Approximate the greatest real zero of the function g(x)= x^3-3x+1 to the nearest tenth. I know that there is a zero between -2 and -1, and another between 0 and 1 but do not know how to find it to the nearest tenth. The only example shown in my book uses a

asked by Lucy on August 31, 2008
88. ## Discipline

Carl is getting tired of two children in his three-year-old room having wetting accidents on the playground. The class always uses the restroom before they go outside,but two of the boys are wetting themselves at least once a week,making Carl have to send

asked by Belinda on January 16, 2007
89. ## Calculus

The equation for converting Farenheit to Celcius is F=9/5C + 32. What is the meaning of the slope of this line? A. For every 9 degree increase in Celcius, there's a 5 degree increase in Farenheit. B. For every 5 degree increase in C, there's a 9 degree

asked by twa on February 2, 2009
90. ## Math - Cubes

Consider a cube of side 100cm. Consider two diaganolly opposite points (the main body diagnol) as A and B. The cube is kept flat on the ground, and is filled with water upto a 40cm height. Now, the cube is tilted such that AB is vertical. What's the height

asked by Arora on December 29, 2017
91. ## Chemistry

I need help with these two problems: At a given pressure and temperature, it takes 4.55 min for a 1.5 L sample of He to effuse through a membrane. How long does it take for 1.5 L of H2 to effuse under the same conditions? A gas-filled weather balloon with

asked by Amy on October 5, 2008
92. ## Chemistry

The question says write a reaction for the ionization of the following compound in water. Identify the acid, the base, the conjugate acid, and the conjugate base in each of them. 1. H2SO4 2. KOH 3. CH3COOH 4. NH3 5. HNO3 My guesses are: H2SO4 + H2O -> H3O+

asked by Samantha on May 31, 2009
93. ## chemistry

Aspirin (C9H8O4) is synthesized by reacting salicylic acid (C7H6O3) with acetic anhydride (C4H6O3). The balanced equation is given below. C7H6O3 + C4H6O3 C9H8O4 + HC2H3O2 What mass of acetic anhydride is needed to completely consume 3.60 x 10^2 g salicylic

asked by lyne on January 23, 2009
94. ## Chem

There are three questions in particular that I am having problems with. Here they are 1. A standard solution of FeSCN2+ is prepared by combining 9.00 mL of 0.200 M Fe(NO3)3 w/1.00 mL of 0.0020 M KSCN. The equilibrium concentration of FeSCN2+ ([FeSCN2+]std)

asked by Mark on January 19, 2009
95. ## MATH!

How do you make a coordinate plane graph? I can't go and get my text book because its winter break! Could someone help me here? I need to know how to make one using an equation. specifically these equations y = 6x - 2 y = -3x + 5 y = ½x + 3 please I need

asked by Austin on December 21, 2006

Pick a team that you are currently a member of, a prior team in which you were a member, or search the Internet for an example of a real-life team. Be sure to choose one that meets these two criteria: (1) it’s not part of a for-profit business and (2)

asked by Ronald on December 13, 2010
97. ## Chemistry

Consider the equation: A + 4B=3C+3D, when equal masses of A and B are reacted, which is limiting? My possible answers are: A)if the molar mass of A is less than the molar mass of B, then B must be limiting. B) If the molar mass of A is greater than the

asked by Jessica on March 21, 2012
98. ## Earth's Dynamic Atmosphere

Air pressure doesn't crush everything underneath it because A. air pressure is hypothetical and not a real force. B. air pressure is strong enough. C. things on earth have learned to withstand the constant pressure. D. air pressure is exerted in all

asked by Prisila on December 30, 2017
99. ## Trigonometry

The number of hours of daylight in a city in the northern hemisphere shows periodic behavior over time. - The average number of daylight hours is 12 - The maximum number of daylight hours is 14.4 - The period is 365 days - The day with the least sunlight

asked by Max on March 2, 2018
100. ## math

There are 10 children (aged 1 to 10 years) who have equal amounts of money. In the first transaction the eldest child gives one rupee to every child younger to him. In the second transaction, the second eldest child gives one rupee to every child younger

asked by jenny on November 17, 2014